# https://checkgzipcompression.net llms-full.txt

## [GZIP Compression Checker](https://checkgipcompression.net)

Check GZIP Compression is a fast and simple tool that helps you find out whether a website is using GZIP or Brotli compression. Just paste any public URL, and you’ll get instant results showing compression status, file sizes, and how much faster the site could load.

Our goal is to make website performance checks easy and accessible for everyone—from developers and startup teams to site owners with no technical background.

### What we do
- Instant compression checks
We inspect response headers like Content-Encoding to detect GZIP, Brotli, or no compression at all.
- Real performance insights
See original file sizes, compressed sizes, and estimated savings so you know exactly what to improve.
- Support for modern compression
We analyze both GZIP and Brotli across common asset types such as HTML, CSS, JavaScript, and JSON.
- Simple API access
Use our clean, documented API to check compression programmatically in your own tools or workflows.
- Privacy-first approach
We don’t store URLs, results, or personal data. Each check is performed in real time and then discarded.

### How it works
1. We fetch the URL and follow redirects to the final response.  
2. We inspect HTTP headers to detect compression methods in use.  
3. We measure payload size and estimate potential savings if compression is enabled or improved.

Most checks complete in under two seconds.

### Why it matters
Compressed websites load faster, use less bandwidth, and provide a better user experience. Faster pages also help with SEO and conversion rates. Check GZIP Compression gives you clear answers and actionable guidance without setup, signup, or cost.

### Who it’s for
- Web developers and engineers  
- SEO specialists and performance analysts  
- Startup teams and agencies  
- Website owners who want faster load times

The service is completely free, with no hidden limits or registration required. Enter a URL, run the check, and get results instantly.

Check your site’s compression and see how much speed you’re leaving on the table.

## [About Us](https://checkgzipcompression.net/about/)

Check GZIP Compression makes it effortless to verify whether a public website uses GZIP or Brotli compression. Paste any URL and get instant, byte-accurate results — no technical knowledge, no signup, no cost.

Why we exist A single uncompressed page can cost real users time and real companies money. We started after a debugging session revealed 2.3MB of uncompressed HTML that dropped to 400KB with compression enabled. That simple fix showed how many sites unknowingly lose speed and visitors.

We’ve helped thousands of sites find and fix missing compression, saving bandwidth and improving user experience — especially for people on slow connections.

Try it now No signup, no tracking. Paste a URL and see whether your site is using GZIP or Brotli — and how much faster it could be.

## [Download Plugin](https://checkgzipcompression.net/download/)

Get our free WordPress plugin to automatically check your site's GZIP and Brotli compression status from your WordPress dashboard.

Quick details
- File size: 2.1 MB
- Cost: Free
- Account: No account required
- Download: Instant
- Version info
- Current version: 2.4.1
- Released: Jan 14, 2026
- WordPress compatibility: 6.9
- PHP required: 7.4+

### What the plugin does
- Automatically scans your site and reports whether responses are served with GZIP or Brotli.
- Shows compression ratios and estimated bandwidth savings.
- Runs periodic checks and displays results in the admin area.
- Minimal performance overhead — lightweight and fast.
- Privacy-first: no URL or result storage; checks are performed in real time.

### Why install
- Confirm compression is active without using devtools or curl.
- Monitor compression health directly in WordPress.
- Helps reduce page weight, bandwidth, and load times for visitors.

This plugin works with common hosting setups; if your host applies server-level caching or proxying, some checks may reflect those layers.

## [API Docs](https://checkgzipcompression.net/docs/)

Compression API for developers
Integrate compression checking into applications, CI/CD pipelines, and monitoring tools with a simple REST API.

Free tier
- 1,000 requests / month  
- No credit card required  
- Instant access

Get an API key in 30 seconds: Enter your email, get an API key, and start calling the API. No complex setup.

Quick start (cURL)

curl -X POST https://checkgzipcompression.net/api/check \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com"}'

What you get

- Instant compression analysis (typically < 2s)  
- Byte-accurate measurements: raw size, estimated gzip size, savings percentage  
- Encoding detection: gzip, brotli (br), or uncompressed  
- Reliable infra with 99.9% uptime

Primary endpoint
POST /api/check
Request body

{"url": "https://example.com"}

Example response

{
  "ok": true,
  "url": "https://example.com",
  "finalUrl": "https://example.com",
  "status": 200,
  "hasGzip": true,
  "contentEncoding": "br",
  "measuredRawSize": 32609,
  "estimatedGzipSize": 6591,
  "savingsPct": 79.79
}

Limits & errors

- Monthly requests: 1,000 (resets on the 1st)  
- Rate limit: 10 requests / minute  
- Batch calls: up to 10 URLs per call
Common HTTP responses:
- 200 — Success  
- 401 — Unauthorized (invalid/missing API key)  
- 429 — Rate limited

Integration examples

JavaScript (fetch)

const apiBase = 'https://checkgzipcompression.net';
const response = await fetch(`${apiBase}/api/check`, {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer ' + apiKey,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ url: 'https://example.com' })
});
const data = await response.json();
console.log(data.savingsPct + '% savings');

Python (requests)

import requests

apiBase = 'https://checkgzipcompression.net'
r = requests.post(f'{apiBase}/api/check',
    headers={'Authorization': f'Bearer {api_key}'},
    json={'url': 'https://example.com'})

print(f"{r.json()['savingsPct']}% savings")

Fair usage policy

- Designed for development, monitoring, and CI use.  
- Contact support for higher limits or commercial plans.

## [Contact Us](https://checkgzipcompression.net/contact/)

Need help verifying compression or optimizing your site? Our support team is ready to assist.

Get support
- 24h response — we reply within 24 hours.
- Expert help — guidance on GZIP/Brotli, server configuration, and plugin use.
- Free — no cost for support.

Email: hello@checkgzipcompression.net (typically replies within 24 hours)